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Charge-exchange X-ray emission of M82: K alpha triplets of OVII, NeIX and Mg XI
Liu, Jiren1; Mao, Shude1,2; Wang, Q. Daniel3
2011-07-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号415期号:1页码:L64-L68
摘要Starburst galaxies are primary feedback sources of mechanical energy and metals, which are generally measured from associated X-ray emission lines, assuming that they are from the thermal emission of the outflowing hot gas. Such line emission, however, can also arise from the charge-exchange X-ray emission (CXE) between highly ionized ions and neutral species. To understand the feedback of energy and metals, it is crucial to determine the origin of the X-ray emission lines and to distinguish the contributions from the CXE and the thermal emission. The origin of the lines can be diagnosed by the K alpha triplets of He-like ions, because the CXE favours the intercombination and forbidden lines, while the thermal emission favours the resonance line. We analyse the triplets of OVII, NeIX and MgXI observed in the XMM-Newton reflection grating spectra of the starburst galaxy M82. The flux contribution of the CXE is 90, 50 and 30 per cent to the OVII, NeIX and MgXI triplets, respectively. Averaged over all the three triplets, the contribution of the CXE is similar to 50 per cent of the total observed triplet flux. To correctly understand the hot outflow of starburst galaxies, it is necessary to include the CXE. Based on the measured CXE fluxes of the OVII, NeIX and MgXI triplets, we estimate the relative abundances of O, Ne and Mg of the outflow and find they are similar to the solar ratios.
关键词Atomic Processes Plasmas Ism: Abundances Ism: Jets And Outflows Galaxies: Individual: M82 Galaxies: Starburst X-rays: Ism
DOI10.1111/j.1745-3933.2011.01079.x
收录类别SCI
语种英语
WOS记录号WOS:000293755000014
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8084
专题星系宇宙学研究部
作者单位1.Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England
3.Univ Massachusetts, Dept Astron, Amherst, MA 01002 USA
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Liu, Jiren,Mao, Shude,Wang, Q. Daniel. Charge-exchange X-ray emission of M82: K alpha triplets of OVII, NeIX and Mg XI[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,415(1):L64-L68.
APA Liu, Jiren,Mao, Shude,&Wang, Q. Daniel.(2011).Charge-exchange X-ray emission of M82: K alpha triplets of OVII, NeIX and Mg XI.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,415(1),L64-L68.
MLA Liu, Jiren,et al."Charge-exchange X-ray emission of M82: K alpha triplets of OVII, NeIX and Mg XI".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 415.1(2011):L64-L68.
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